Rotary draw-block hammer.



N0. 655,028. Patented July 3|, I900. W. SNELLER. ROTARY DRAW BLOCK HAMMER (Application filed. Mar. 24, 1900.)

(No Model.)

' Mam/4 ATTORNEY.

LVITNESSES UNITED STATES;

PATENT OFFICE.

WILLIAM SNELLER, OF IONIA, KANSAS, ASSIGNOR OF ONE-HALF TO JOHN G MCCLUN AND LEONARD VIERGIVER, OF CAWKER CITY, KANSAS.

SPECIFICATION forming part of Letters Patent No. 655,028, dated July 31, 1900. Application filed March 24,1900. Serial No. 10,031. (No model.)

in the county of Jewell and State of Kansas,

have invented, certain new and useful Improvements in Rotary Draw-Blow Hammers;

and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had 'to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to that class of hammers in which the hammer proper is attached to a helve that is pivoted to a rotat ing wheel or an arm, and the object is to improve such hammers, so that a draw-blow may be given thereby and also be rendered adjustable, so as to be adapted to work on various degrees of thickness of metal upon a fixed anvil.

The invention consists in a hammer-helve provided with a spring having a bearing upon the top of the helve and supported by the 'wheel or the arm to which the helve may be pivoted and means whereby the tension of the spring may be varied and also whereby the angularity of the helve and particularly the hammer may be varied.

The invention consists also in impibved mechanism whereby to operate the hammer;

and it consists, further, in the parts and combination and arrangement of parts particularly described hereinafter and pointed out in the claims.

Referring to the drawings, Figure 1 represents a perspective view of my machine complete; Fig. 2, a side elevation of a portion of the machine, showing the hammers as preferably mounted and the spring and adjusting means as preferably constructed; and Fig. 3 a fragmentary view showing the manner in which the helve is preferably constructed and connected with the spring.

In the drawings, similar letters of reference throughout the several views designate similar parts.

In construction I provide a suitable base or foundation part upon which is mounted a pair of posts. or standards, as A and A, in which a 'shaft B is suitablyjournaled. Near the post A is a disk or circular plate E and a'friction-wheel F, suitably connected rigidly together,with a space between them and rotatably mounted upon the shaft B, together comprising a hammer-carrying head. Adjacent to the wheel F is a clutch mechanism adapted to engage the wheel and comprising, preferably, a pair of oppositely-disposed radial arms G, secured rigidly to the shaft B. A little removed therefrom are a pair of similarly-disposed guide-arms H, also secured to the shaft B through the means of a suitable hub. On the shaft B is a sliding cross-head I, between which and thehub of the arms H is seated a coiled spring J. Levers k are pivoted to the arms ..G and at one end are adapted to frictionally engage the periphery of the wheel F, while at the opposite end they are each connected by a linkL to the cross-head I. A lever M, having a bifurcated arm ct, engages an annular groove 0 in the body of the cross-head I and is suit ably supported pivotally, as by a bracket a.

A treadle N is suitably supported as by a rod.

01 pivotally and is connected by alink b with the lever M. The anvil O is conveniently arranged with respect to the hammers, so that its top surface is somewhat below the plane of the shaft B, M

The hammer-helve P is pivotally connected at its end opposite the hammer upon a wristpin h, secured to the plate E and also to an arm 6 of the wheel E and extending from one to the other, being situate at a suitable dis tance fromthe shaft B. Usually two hammers are employed in a machine. A curved bar R is attached at one end by a suitable headpiece m to the plate E (and, if desired, also to the wheel F or to this alone) and extends through a guideway with which the helve is provided, which is preferably an aperture '5 in the helve, situate, preferably, closer to the hammer Q than to the pin it. The free end of the bar has screw-threads, on which is a screw-threaded adjusting-nut T. A coiled spring 8 of suitable length encircles the bar It and is seated between the helve and theheadpiece m, while at the opposite side of the helve (being the lower side in use) is a shorter spring S, similarly formed and mounted and seated between the helve and the adjusting-nut. Thehelve is so mounted between the springs that itextends outwardly from the pin it at an oblique angle to an imaginary line drawn transversely through the shaft Bandthe-pin h, so that when the'face of the hammer Q rests Tfairly upon the'anvil the pin it shall be in a position somewhat below the shaft B and toward the hammer or a short distance below a line drawn through the shaft B and the bottom of the hammer. In this construction the cushion-springs retain the hammer normally in a fixed position relatively'to the hammer-carrying-head com prising the plate E and wheel F, except when the hammer is delivering its blow. By means of the nut 1 and short cushion-spring S (which spring, however, maybe dispensed with, if desired) the positions of the hammer relatively to the anvil may be varied as may be desired and-the degree of draw or drag of the blow varied to accommodate various thicknesses'o'f metal f to be drawn out.

Thesha'ftlBis provided with a hand-crank O or a belt-wheel D, or both, secured to the shaft,by whichto apply powerto the machine. Obviously the minor details of construction may be varied Within the scope of my invention. 1 e

In practical use the shaft B is suitably put it and reduce its thickness as the hammer is drawn therefrom" slidingly by reason of the pin it passing'runder the shaft B, the plate E moving in the. directionof the arrow. More. or less emw may be given by varying the tension ofthe'spring s accordingly.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is- 5 r v p I 1. In ahammering-machine, the combination of the rotating plate and its axial shaft,

tion, of the rotating shaft, the hammer-carry ing headcarried by the shaft, the helve pi'v' oted in said head, the hammer attached to the helm, the guideway in the helve, the curved bar supported by said head and extending through the guideway, the spring mounted upon the curved bar and pressingupon-the top'of the helve, the adjustingnut on the 7;:

curved bar at the opposite side of the helve,

and the anvil.

such head and extendingthrough the guide- Way, the spring carried by such head'and seatedagainst the helve, and the adjustingnuton the bar. I V

a m Q gmachinei'the combinathewris't-pin secured to the plate, the helve I connected to the-wrist-pin, the guidewayin the helve, the headpiece secured to the ro- V :75 headpiece and extending through the guide-' #7 way, the spring seated between the headpiece tating plate, the curved bar securedto the and the helve,-the nut on thefree end'of thecurved bar, the spring betweenthenut and 5 thehelve, the ham mer on'the helve, and the anvil.

vices, the lever connectedto theclutchdesupported between the rotating plate and the 4. In a hammering-machine, the combinap tion of the frame, the anvil, the rotating shaft, 1 I the crank, the friction-wheel, the clutch de- 5- vices, the treadle connectedto the lever, the; 3 i rotating plate on-the shaft carried by the friction-wheel, the wrist-pins, the pivoted helves 1 Y provided with the guideway,-the curved bary I friction-wheel and'extending tllI'Ollgl1-Ul16} guideway, the cushion-springs 'engagingthehelve, the hammer on the helve, and the ad- 1 I 1 j u'sting-nut:on the curved bar, substantially" 955 In testimony whereof I afiixmy-signature i I as set forth.

in presence of two witnesses.

a. WILLIAMSNELIJERj f Witnesses: I J. W. TUCKER,

M. MEIBERGER. 

